Delete AllowEditeRange by VBA command

Dear All,
Can anyone help me to correct the following code:

Private Sub CommandButton1_Click()
Dim WS As Worksheet
Dim aer As AllowEditRange
For Each WS In Worksheets
For Each aer In ActiveSheet.Protection.AllowEditRanges
aer.Delete
Next aer
Next WS
End Sub

This Code I do it to remove all AllowEditeRanges in every sheet in excel, but unfortunately it works only in the sheet that the command button exist in and NOT for every sheet.
So can anyone help me to modify this code.
Thanks in advance.

Celina